Type-writing machine.



PATENTED MAY 8, 1996- H. S. MQGORMAGK.

TYPE WRITING MACHINE.

APPLICATION FILED 00T.11..1904.

a SHEETS-411E211] am m1, auto};

PATENTED MAY 8, 1906.

H. S. MOGORMACK- TYPE WRITING MACHINE.

APPLICATION FILED 001211, 1904.

3 SHEETS-SHEET 2,

PATENTED MAY 8, 1906.

H. S. MOGORMACK- TYPE WRITING MACHINE.

APPLICATION FILED OGT.11, 1904.

3 SHEBTSSHBET 3,

Fig. 5

UNITED STATES. PATENT OFFICE.

HARRY s. MdJORMACK, oF raovmnucn. RHODE ISLAND, Assreuon To uuenawooo' TYPEWRITER COMPANY, or NEW YORK, N. Y., A GOR- PORATION OF .NEW JERSEY.

TYPE-WRITING MACHINE.

' To an whom itv may concern.-

Be it known that I, HARRY S. MeCoaMAo r, a citizen of the United States, residing m Providence, in the county of Providence andspecification.

This invention relates to the paper-feeding devices of type-writing machines; and one of. its objects is to facilitate the recording of inv-oices or bills by the use of carbon-sheets in such a manner that carbon copies of several blllS ma succeed one another upon a single record-s eet without, however, leaving great spaces between the copies of the several bills. T1118 0 CIiLtIOD is commonly known as con- I dense charging, the bill,carbon,and recordsheet being inserted in the machine together, the bill type-written and removed, the carbon and the record sheet remaining in the machine, and afresh bill being inserted and type-written and then removed, and so on unt-il'the record sheet is'filled. It is usual to turn the platen baokwardly, together with the record-sheet .and carbon, to receive the new bill-head and then to turn the platen forwardly until it is in position for writing the first line uponthe bill, which first line will properly succeed the lines theretofore written upon the recordsheet. In order -to determine how far to turn the platen backward and forward, it is usual to employ a pair of cooperative linescales, one adjustab in connection with an index; but this necessitates frequent consultation of the scale, which 'is a tax upon the operator, and mistakes are likely to happen.

In using my improvements the platen may be rotated either by means of the usual linospacing mechanism or by means of the usual platen-knobs, either forwardly or backwardy to an unlimited extent, while at any time by manipulating a special crank or lever the platen may be rotated back to receive a new bill and forwardly to bring the same to printing position, the limits of both back and forward movements of the platen beingmechanically determined. Provision is also made whereby the back and forth rotation of the crank and platen may be varied at will to suit ,difierent kinds of bills.

A further object of my invention is to pre- Specification of Letters Patent. Application filed 0ct0ber-1I,l904. Serial No. 227,998.

e relatively to the other,

Patented May 8, 1906.

vent the record and carbon sheets from accidentally wra ping around the platen a second timet at is, to prevent the leading -edges of said sheets after theyfeed up in front between the paper-she f and the platen to pass around the platen again.

Other objects will hereinafter ap ear.

In the accompanying drawings, igure 1 is a plan of platen and platen-frame of an Underwood type-writing machine, showing my improvements applied thereto. Fig. 2 is an end elevation of the parts seen at Fig. 1, the platen-actuating crank being shown in its normal idle position in full lines and in dotted lines at the limit of its throw. Fig. 3 is a front elevation, partly in section, of the rightcarriage with the parts in the positions seen at right-hand end of the platen-frame, showing the usual line-spacing.devlces. Fig. 5 1s a "nanccs. Fig. 6 is a section taken at about the hue 6 6 of Fig. 5. Fig. 7 1s a section ,ing the reverse side of the crank. Fig. 8 is a view similar to Fig. 5, but showing the crank at the other end of its stroke. Fig. 9 is a perspective view of an adjustable stop-arm. Big. 10 is a section taken at about the line ll) 10 of Fig. 8. F ig. 11 is a sectional elevation of the platen, showing the improved papergu ding fingers.

11 designates the usual cylindrical platen ,of an Underwood type-writ ing machine,- fixed upon an axle 12, journaled in a platen-frame 13, the ends of the axle projecting from the platen-frame and haviiigfinger-wheels 14 15 fixed thereon; By means of either fingerwheel the platen may be rotated forwardly or hackwardly to an unlimited extent. The platen is also provided with the usual linespaeing devices, including a line spacing wheel 16, rigid with the platen and advanced intermittently by a pawl 17, which is oper ated in the usual manner by a slide 17' and a lever, (not shown,) a spring-gletent 17 being employed to retain the line-space wheel by engagin the notches thereof and being adapt Wheel is usually provided.

Mounted loosely upon the platen-axle 12 hand end of the platen and platen frame or taken at about the line 7 7 of Fig. 6 and showof and back over the laten from rentering Fig. 2. Fig. 4 is a sectional elevation of the[ side elevation of the crank and its appurteed to IILO over the teeth 18, with which said by means of shu'b 39*" a crank 1% of greater radius than the plates, and extending from said side upwardly an d rearwardly, so as not to he liable to be struck accidentally by the oe etor during the ordinary use of the mahe and provided with a finger-piece or handle 20. Fixed to the platen-axle 12 is a wheel 21, having the same number of teeth 22 as the li1ie-spsce wheel 16, the hub 19 of the crank being confined between said wheel 21 and collar fixed upon the platenexlo Extendin along said crank is a bar: :24, buriug at its ov/er or imier end teeth 25, Fig. 7, normally out of engagement with the teeth 5 g but adapted to engage or clutch the same,

said h ving longitudinal slots 26, whereoy is mounted upon shoulder-screws 27, sereized into the crank 19, compressionspa" ZQuormslly holding said her out of? i uent said wheel 23., the bur being provided with a housing 29 for the spring and the letter boerihg against a lug 30'upon the inner end of the crank.

Since the crank is normally unclutohed to the wheel 23 the platen may be rotated forwardly or backwardly any desired distance, while said crank remains motionless or idle; but at any time the bar 24 may be pressed inwardly by means of a linger-piece 31, provided upon the outer end thereof, so that the teeth 25 engage the teeth of wheel 21, Whereupon the crank may be swung forwardly by means of the lingeupicce 20 and then back to normal position, the platen of course being caused to turn or oscillate with the crank.

The forward and downward throw of the crank may be limited by stop 32, carried by an arm 33, that is pivoted loosely upon the hub 34 of Wheel 23, whereby the stop-may be '40 swung to any desired position concentrically with the platen aixle. To hold the stop where adjusted, a circular rack is provided concentrio with the platen-axle and consisting of a circular series or row of holes 35, formed in a disk 36 near its edge, the disk being fixed and the holes or notches being engageable by a stud or pin 37, which passes longitwlinally through the stop 32 and is provided at its outer'end with a head 38, whereby it may be withdrawn from the rack, a suitable spring .39, Fig. 6, surrounding said pin within said stop and serving to hold the pin in engagein'ent with the selected hole '35. As many holes 35 may be provided as desired; but since the adjustment of the platen is usually less than on entire revolution it is not necessaryin all cases to have the row of holes extendall the Way around the disk, while the at Fig. 5) may be quite normal position of the crank, since in af1'0 t strike machine the platen usually 'turns through about a third of a revolution from thefeedin -in point to the printing-point.

me or disk 36 is stationary. It is first'hole (seen at the left-hand side of the disk a distance from the slaves mounted upon the hub 3d of whee; A; but the hub fits loosely in the bore of the disk, and the latter is prevented from rotating by means of a rod, Fig. 2, preferably consisting of two end pieces 40 41, connected by a turnbuckle 42 end attached by screw 43 to the disk and l'iy-screw 4A to a stud 45, projecting from the end of the platendrame. By means of the turnbuckle the disk may be given fine rotative adjustment, so that when the crank and platen are arrested the usual line-spacewlieel detent may be in full engagement with a notch in the line-space wheel, thus securing certainty of operation of the mechanism v The crank is clutched to the platen without causing either to rotate, and then by swing ing the crank until arrested by the stop 32 the platen is rotatec through on are exactly equal to a predetermined number of linespsecs without liability of either overthrow or underthrow of the platen.

While the finger-piece 31 serves to engage teeth 25 with wheel 21 and may in some cases be depended upon for maintaining the engagement, I prefer to provide means for maentafiifng such engagement mechanicall and to this end ll rix upon the bar 24 a stud preferably a roller-stud-46, which normally occup'es anotch 47, formed in the circular rack 36, and prevents the crarlk from moving, the stud being held in the notch by the spring 25%. When-the finger piece 3} is pressed in, the stud 46 is moved out of the notch, and during the swinging of the crank the stud runs in a groove 18, formed in the disk, the outer wall 49- of the groove forming an inteplaten-axle, against which the stud 46 constautly bears to mainta n the engagement of teeth 25 and 22. This manner of mahtainfng the engagement is a great convenience,

iCO

'rlor circular bearing concentrfc with ,the'

since after the crank is started the vfingerp.ecc 31 may be released, and when the crank is arrested by the etc 32 thecrank may also be released wftho'ut disturbing the locking of the crank to the platen, and hence it is in sure'd that the latter shall be returned by the crank to exact inital osition, A stop 50 may be provided to limit the return stroke of the platen and crank, said stop preferably adjacent to the notch 47 and in position to be struck by the stud 46.

It will be observed that the stop-arm 33 is confined between the wheolZl and the disk 36 and that disk, wheel, and crank are confine between the fixed collars 23 and 51, the latter adjoining the right-hand end bar of the platen-frame and fixed to the platen-axle.

The record-sheet, bill, and interleaved carbon may be inserted together between the platen 11' and the usual paper-shelf 52. Thev' are then carried around by the usual" pres eurerrolls 53, Fig. 3, untl the proper blank line upon the b?ll is brought to the printingpoint. The bill is then writteo'li'n by line,

release key 54 ma front the platen, while the'record and carbon sheets remain in the machine undisturbed. The key 54 is then released, and the operator grasps the handle of the crank,- simultaneously depressing the finger-piece 31, and pulls the crank forwardly as'far as it will go. By this operation the carbon and record sheets are rolled back for a distance equal to the s ace occupied by the rinted matter on the ill-head. Then a fres bill is inserted and the crankis turned back as far as it will go, being arrested by the stop 50 and the spring 28 serving to disengage the teeth from the'teeth 22, thereby-.permitting free rotation of the platen in either di rection. B Y the last movement of the crank the fresh bill is brought to the front of the platen and is then written, the carbon copy thereof succeeding the copy of the first-written bill upon the record-sheet. The second bill may then be withdrawn and a fresh bill inserted in the described manner and the operations repeated for successive bills unt-l o\ the record-sheet is filled.

\ The position to which the stop 32 should be set may be determ ned by first insertng a bill (or letter-head) in the mach ne and turning the platen untl the first wr. t-ng-line on thek bill reaches the printing-poZnt. Then the platenis turned backwardly by means of the crank untl the b=ll passes back of the usual rear feed roll, and hence is released When the crank is at of the crank thereafter shall be the same length as the stroke just made.

' e In practice after the length of stroke of the crank is thus ascerta'ned the stop should be set forward two notches, so as to shorten the throw of the crankto that extent. It follows that when a new bill is inserted the movement of the crankwill not quite bring the first line of the b1] to'the print'ng-point,

which the operator will notice. The operator will then operate the l ne-spac'ng dev'ces in the usual way to advance the platen two spaces, thereby not only brfnging the first line onthe b ll to the printnig-po'nt, but also insuring a proper space upon the recordsheet between theTbll-reeords. It thus becomes unnecessary to. put upon the m ndoi the operator the burden of rememberng to line-space the record-sheet between b lls, and the danger of superposfng the first line of the new b ll upon the last'line of theprior record is avoided.

The paper-shelf, 52, which is seen at Figs 1 and 4, in rearof the platen inclines downwardly and'forwardly to the platento guide gers 55,

the paper thereto as usual, and in front of the platen the paper is guided by the usual fin- WhJOh are adjustable along a rod 56, mounted upon the platen-frame over the rear ortion of the platen, each finger being adustable independently of the other to any position along the rod. Upon said fingers I provide a pair of sheet deflectors or sup orts 57, which extend rearwardly above sal rod to sustain the leading edge of the sheets as they feed rearwardly over the platen.v During the extensive backward and forward movements of the record and carbon sheets usual in condensed charging these sheets have heretofore bGOILii-Pi/ to curl down between the paper-"sl'ielf and the platen and wrap around the platen a second time; but

.by the provision-oi the additional supports 57, which extend backwardly and u wardly toward the paper-shell", this liability is avoided.

Yariations may be resorted to within the scope of my invention and portions of my improvements may be used without others.

Having thus described my invention, 1 claim- 1. in a type-writing machine, the combination with a revoluble platen, a line-s ace wheel, and 1a. platen-frame, of a erant of greater radius than the platenand normally disconnected from the platen and mounted to turn about the platen-axis, means for niaintaining the crank in normal position during the rotation of the platen for usual line-spacing, means for connecting thecrauk at will to the platen, so.that it can rotate the platen both forwardly and lmcku'aidl and crank away from its normal position.-

2. In a type-urflrng machine, the combian adjustable stop to limit the movement of the nation with a revoluble platen, line-spacing devices, and a platen-frame, of :i r-,ink.'ncr-- mally disconnected from ihe platenfand mounted to turn about the platen-axis, said crank extendingupwardly and rearwardly from the platen-axisandbeing of greater radius'than theeplateii, means for" maintaining the crank in normal position during the rotation of the platen for usual line-spacing, means for connecting the crank ht will to the platen, so that it can rotate the platen both forwardly and backwardly, igid a stop adjustable about the platen-axis, for limiting the movement of the crank away from its normal position.

3. In a type-writing machine, the combination with a revoluble platen, line-spacing devices including a toothed line-space wheel,

and a platen-frame, of a erankhaving greater 1 radius than the platen and normally disconnected from the platen and mounted to turn about the, platenaxis, a second wheel fixed to the platen and having as many teeth as the line-s ace wheel means u on said crank for engaging the teeth ofsaid second wheefi for 6o mains stationary, means for 1o ing said crank in normal position during the usual rotation of the platen by the line-spacing devices, a second wheel connected to the platen and having the same number of teeth as the line-space wheel, means upon said crank for engaging the teeth of said second wheel for locking the crank thereto, in such a manner that the crank may efi'ect nearly an entire revolution of the platen both forwardly and hackwardly, and an adjustable stop for limiting the movement of said crank away from normal position.

5. In a type-Writing machine, the combination with a platen-frame, of a platen, a platen-axle mounted in said frame, finger- 2 5 Wheels upon the ends of said axle, line-spacing devices including a toothed wheel a second wheel fixed to said axle and having the same number of teeth as/said line-space wheel, a crank mounted to ti'irn about said axle and having greater radius than'the platenand normally disconnected from said second Wheel, toothed means for clutching said crank to said second Wheelat will, so that the crank can rotate the platen both forwardly and backwardly, and relatively adjustable stops for limiting the movements of said crank in opposite directions.-

4 6. In a type-Writing machine, the combination with a platen, oi a platen-axle, a frame so WhQIGOD said axle is journaled, finger-wheels.

fixed upon the ends of said axle, a platen-actuating member mounted to turn about said axle but normally disengaged from the platen. so that the platen may be freely turned in either directionwhile said actuating member remains stationary, means for, clutching said? actuating member at Will to the laten so that it can rotate the platen both 'orwardly and backwardly, and. adjustable means for limiting the movements of said actuating member. 7 4

7 In a type-writin machine, the combination with a platen, o a platen-axle, a frame Whereon said axle is jou'rnaled, finger-Wheels 5 5 fixed upon the ends'of said axle, a platen-actuating member mounted to turn about said axle but normally disengaged from the platen so that the platen may freely turn in either direction While said actuating member reclutching said actuating member at will to the laten so that it can rotate the platen both 'orwardly and hackwardly, a stop for limiting the movement of said actuating memberfronr normal .position, and,a circular rack fixed upon the I platen-frame concentrically with the platen axle and cooperating with said stop:

8. In a type-writing machine, the .combi-' nation with a platen, of a platemaxle, a frame Whereon said axle is journaled, finger -Wheels fixed upon the ends of said axles, line-spacing devices including a toothed line-space Wheel,

a second wheel fixed to said axle and having normally disengaged toot ed device to clutch the teeth of said second Wheel, so that said platen-actueting member can rotate the platen both forwardly and batkwardly means for maintaiuin said platen actuating spacing movements of the platen, a stop for ating' member from normal position, and a circular rack fixed upon the platenframc and cooperating with said sto nation with a platen, of a platen-axle, a frame Whereon said axle is journaled,finger-Wheels fixed upon the ends of said axle, line-spacing devices including a toothed line-space wheel, a second Wheel fixed to said axle and having the same'numbcr of'teeth as said line-space wheel, a crank of greater radius than the platen and mounted for revolution about said axle, means for maintaining said crank stationary in normal position during the usual line-spacing movements of the platen, a manually-sperable clutch connected to said crank and having a tooth to engage said second wheel, so that saidcrank can rotate the platen both forwardly and backwardly, a rack having a fixed relation to said platenframe and concentric with said platen-axle, and an arm' adjustable about said axle independently thereof and having a stop to engage said rack, for limiting the movement of said crank from normal position.

10. In a type-writing machine, the combination with 'a platen, of a platen-axle, a frame whereon said axle is journaied, finger-wheels fixed upon the ends of said axle outside of said frame, line-spacing devices including a toothed line-space wheel, 'a second Wheel fixed to said axle outside of said frame and having the same number of teeth as said linespacc Wheel, a circular rack concentric With said platen-axle and fixed to said frame bethan the platen member stationary during the usualfline 9. in a type-writing machine, the combi the same number of teeth as said line-space wheel, a platen-actuatin member having a limiting the movements of said platen-actutween the latter and said second wheel, it

7 nation with a revolub nation with a platen and line-spacing devices inclusive of a toothed line-space wheel, of a second wheel connected to the platen and having the same number of teeth as said linespace wheel, a crank, means for maintaining said crank in normal position during the rotation of the platen by said line -spacing devices, a bar extending along said crank and having a finger-piece-and rovided with a tooth to engage said secon wheel, a spring holding said bar out of engagement with said second wheel, and an adjustable stop for said crank. I

'12. In a type-writing machine, the combination with a platen of a wheel connected thereto and provided with teeth, a crank having reater radius than the'platen and mounted concentrically with said wheel but normally disengaged therefrom, a member actuatable by said crank and having a tooth to engage said wheel so that said crank can rotate the platen both forwardly and backwardly', means normally holding said tooth out of engagement with said wheel, and means for limiting the forward and backward movements of said crank.

13. vIn a type-writing machine, the combination with a platen of a toothed wheel connected thereto, a member provided with a crank and also provided with teeth to engage said toothed wheel but normally out of engagement therewith, means maintaining said crank member in normal position, and an adjustable stop for limiting the movements of said crank member from normal position; said crank member being capable of rotating said toothed wheel together with the platen both forwardly and backwardl and the platen being freely rotatable in ependently of said crank memberwhen the latter is stationaryin normal position.

14. In a type-writing machine, the combination with a platen, of a clutch member connected thereto, a normally stationar clutch member, means for engaging sai clutch members at will for rotating the platen to and fro, and means mechanically maintaining the engagement of said clutch members during the -excursion of the normally stationary clutch member away from and back to normal position. H

15. In a type-writing machine, the combie platen, of a clutch member connected thereto, a second clutch member, means normally maintaining the second clutch member but of engagement with the first and stationary during the usual revolutions of the platen, means for engaging said clutch members at will, a finger-piece connected to the second clutch member for enablingthe latter to rotate the platen, means for mechanically maintaining the engagement of "said clutch members during the excursion of. the second clutch member awaay.

from and back to normal position, and an a justable sto for limiting the movement of the second cv utch member away from normal position.

16. In a type-writin machine, the combination with a platen, o a clutch member connected thereto, a second clutch member normallydisengaged from the first and provided with a finger-piece for rotating the platen, means for enablin said clutch members to be engaged at will, a justable means for limiting the rotation of the platen by means of sai second clutch member, and means mechanic ally maintaining the engagement of said clutch members until the platen is returned to its initial position.

17. In a type-writing machine, the combination with a revoluble platen, of a toothed clutch member connected thereto, a second toothed clutch member concentric with and normally disengaged from the first and pro vided with a finger? iece for rotating the laten', means for enaliling'said clutch memare to be engaged at will,so that said fingerpiece can rotate the platen bot'h forwardly and backwardly, and means capable of maintaining mechanically the engagement of said clutch-members during the movement of the platen through nearly an entire revolution.

18. In a type-writing machine, the combination with a revoluble platen, of a toothed clutch member connected thereto, a second toothed clutch member concentric with and normally disengaged from the first and provided with a finger-piece for rotating the platen, means for maintaining. said second clutch member stationary during the usual revolution of the platen, means for enabling said clutch members to be engaged at will so that the platen may be rotated by means of said finger-piece, adjustable means for limiting the movement of said. second" clutch member away from normal position, and means mechanically maintaining the engagement of said clutch members while said second clutch member is moving away from and returning to normal position.

19. In a type-writing machine, the combination'with a revoluble platen, of normally disengaged clutch members, means for effecting their engagement at will, one of said clutch members being connected to the roc platen and the other being provided with a mechanically maintaining the engagement of said clutch members only while eflecting rotation of the platen through the arc deter mined-by said stops.

20. In a type-writing machine, the combination with a revoluble-platemof a fingerpiece normally disconnected from the platen,

means maintaining said 'fingeriece normally stationary during the usu notations platen and mounted to turn about the platenaxis and extending upwardly and rearwardly from said axis, a toothed bar extending longitudinallyof said crank and mounted to slide 'endwise thereon and provided with both a spring and a finger-piece, said spring normally holding said toothed bar out of enagement ,with said second wheel, and the bar being engageable with said Second wheel by means of pressure upon said finger-piece, a stud or projection upon said bar, a disk mounted concentrically with the platen-axle between said second wheel and the end of the platen-frame and fixed to the latter and having a circular interior bearingi concentric with theplaten-axle, and also having a notch in which said projection is held by the action of said spring, said rojection being adapted to engage said circu ar bearingduring the rotation of said crank, to maintain said bar in engagement with said second wheel, a circular row of notches provided in said disk.ex teriorly of said circular bearing-an arm and stop loosely mounted to turn about said platen-axle, said stop in the path of said crank, and a pin or tooth upon said arm to engage any 0 row.

28. In a type-writing machine, the combination with arevoluble platen and a platenirame, of two clutching members one con nected to the platen and the other provided with a finger-piece for rotating the platen,

stops for limitin the forward and backward rotation of the inger-piece, means whereby the clutching members may be maintained in positive engagement during the rotation of the finger-piece both away from and back to norma position, and means for effecting automatic release of said clutching members.

upon the return of said finger piece to normal rotative position.

29. In a type-writing machine, the combination with a revoluble platen and a platenframe, of two clutching members one connected to the platen and the other provided with a finger-piece for rotating the platen, means for maintaining. saidclutching members in positive enga ement during the rotation of the platen thereby both forwardly and backwardly, means rendered effective through the rotation of said finger-piece, for effecting the release of said clutching members, and stops for limiting the forward and backward rotation of the platen effected by said finger-piece.

30. In a type-writing machine, the combi--\ nation with a revoluble platen and a plateni'rame, of line-spacing devices including a line-space wheel, said Wheel being provided with teeth, a second wheel connected to the platen and provided with the same number of teeth, a member having a finger piece for rotating the tooth engages is with said second wheel at said notches in said circular I spacing T laten and provided with a will, means for arrestin the forward and backward movements 0 said finger-piece, said arresting means including a circular rack'fixed to the platen-frame and a stop adjustable along said rack, and means for effectmg fine adjustments of said rack about the platen-axis.

31. In a type-writing machine, the combination with a platen and a platen-axle of a frame whereoii said axle is journaled, linespacing devices including a toothed linespace wheel, a second wheel having the same. number of teeth as the line-space wheel and connected to the platen, a crank normally stationary during the usual line-spacing movements of the platen and mounted to turn about the platen-axle, a toothed member connected to said crank and engageable at will with said second wheel but normally disengaged therefrom, a circular rack mounted concentrically with the platen-axle, means.

and backward movements of said crank, said arresting means including a sto adjustable along said rack, and an adjustab e device whereby said rack" is fixed to the platen-frame in a man; ner to permit fine rotative adj ustn 'ent of the for arresting the forward rack.

32. In a type-writing machine, the conibi nation with a platen and a plateneaxlelof a frame whereon' said axle is journaled, liiiedevices including a toothed linespace wheel, a second wheel having the same number of teeth as the line-space w'heelfa'nd A iece normally stationary, atoothed member or engaging said second wheel to connect the same to said crank, a circular rack mounted concentricallyj with the laten-axle, a connecting-rod between said circular rack and connected to the platen, a crank or fingerthe platen-frame and including a turnbuckle for enabling fine rotative adjustments of said rack, and means for arresting the forward and backward movements of said crank, said arresting means including a stop ad ustabIe along said rack.

33. In a typewriting machine, the combination with a revoluble platen pr'ovidedwith .a finger-wheel, and a luble member concentric with the platen and platen-frame, of a'revo normally stationary during the revolution of the platen but connectible at Will to the laten to rotatb therewith, means for mechanicall maintaining such connection durin near y an entire revolution of the platen bot forwardly and backwardly, and a stop in the path of said member for arresting the same together with the platen.

34. In a type-writing machine, the combination with a revoluble platen provided with a fin Wheel, a second wheel revoluble with platen and connected thereto and havin the same number of teeth as the line space w evices including a toothed line-space er-wheel, of a platen-frame, line-spac the IIC

nation with a revoluble platen provided with' a finger-wheel, of a revoluble member normally stationary during the revolution of the platen but connectible-at will to the laten to rotate therewith, means for mecnanically maintaining such connection during both forward and backward revolution of the platen, a stop determining the normal position of said revoluble member, and a stop for limiting the movement of said revoluble member from normal position; one of said stops being adjustable. r

36. In a type-writing machine, the combination with a revoluble platen provided with a fmger-wheel, of a normally ineffective revoluble platen-arresting member and stops for limiting the rotation of said member in opposite directions, said stops being relatively adjustable, means being provided for both rendering said member effective at'will and mechanically maintaining the same in elloctive relation to the platen during both backward and forward revolution of the latter, and

. means automatically effecting the release 'of said member from theplaten when the member is arrested by one oi said stops. 37. Ina type-writing machine, the combination with a revoluble platen, a line-space wheel, and a platen-frame, of a circular rack concentric with the platen an fixed to the platen-frame, a stop adjustable along said rack independently of the platen, a revoluble device which is normally stationary during the'usual rotation of the platen butwhichis rovided with means whereby it may become locked to the platen during both backward and forward rotation of the latter, said revoluble device being constructed to cooperate with said stop for arresting'the revolution of the platen in one direction, and means for arresting the revolution in the opposite direction of both the revoluble device and the platen 88. In a type-writing machine, the combination with a revoluble platen and platenaxle, a line-space wheel; and a platendrtme, of a circular rack concentric with the platenaxle and fixed to the platen-frame, a stop adjustable along said rack independently of the platen-a2rle, second stop, and a revoluble member normally disconnected from the laten-'a.xis but provided with means where by it may be positively connected thereto so 'as to rotate both forwardly and backwardly therewith, said revoluble member being engageable with said stops to arrest the forward and backward revolutions of the platen.

39 In a type-writing machine, the combination with a revoluble platen, of two fixed stops, whereof one is provided with means whereby it may be adjusted concentrically with the platen, and a member normally disengaged with the platen but connectible positively thereto, for cooperation with said fixed stops to arrestboth the forward and backward revolutions of the platen.

40. In a type-writing machine, the combination with a revoluble platen, line-spacing devices, and a platen-frame, of a platen-axle mounted upon said frame, finger wheels fixed to the ends of said axle, stops for arrest ing both forward and backward revolutions of the platen, and a crank" with which said stops coact; said crank being of greater radius than the platen and rotatable ahout'said axle but normally disconnected therefrom, and being provided with. means whereby it may be locked to said axle at will so as to rotate forwardly and backwardly therewith.

41. In a type-writing machine, the combination with a revoluble platen, of a crank of greater. radius than the platen and mounted to turn about the platemaxis but normally disconnected from the platen, means for maintaining the crank in normal position, means forconnecting said crank to the platen at will in such ,a. manner as to enable the crank to rotate the platen both forwardly and backwardly, and means for mechanically. maintaining the connection of said crank to the platen during the entire excursion of the crank away from and back to normal position, so that the platen must rotate both forwardly and backwardly with the crank.

'42. In a type-writing machine, the combination with a revoluble platen, line-spacing devices, anda platen-frame, of a platen-axle mounted in saidframe, finger wheels fixed to the ends of said axle without said frame, a circular rack concentric with the platen, a stop adjustable along rack for arresting the revolution of the platen in one direction, a stop for arresting the revolution of the platen in the opposite direction, the platen being normally free to rotate either direction independently of said stops, and a manually-operable device mounte the platen either forward or backward at will and also capable of rendering said stops effective to arrest the platen.

as. in combination, a revoluble typewriter platen providedat its ends with fingerwheels whereby it may berotated in either direction at will to an unlimited extent at any time, and also provided with a crank whereby the platen may be rotated in either direction at will at anytime through any'line-space independently otsald finger-wheels and capable of rotating may are of predetermined extent within nearly an entire revolution, means being provided for mechanically limiting the movements of said platen by said crank.

is. In combination, a revolnhle typewriter platen provided with a line-space wheel and also provided with finger-wheels at its ends wherehy the platen may be ro tatecr through an unlimited number of linespaces in either d'rection, and a crank provided with means whereby it may turn the platen at any time forwardly and backwardly through a predetermined number of line-spaces, stops being provided for limiting the strokes of tne crank and platen, and said stops being relatively adjustable, their relative adinstment lacing limited to line-space interva 45. in a type-writing machine, the combination with revoluble platcnand linc-spacing devices, of a crank normally stationary during the movements of the platen effected by said line-spacing devices, and means for enabling said crank to oscillate the platen at will through a predetermined number of linespaces from any point to which the platen be turned by said linespacing devices means iting the extent of such oscillation in each direction, said limiting means including an adjustable member and a rack along which it may be adjusted, said rack having notches or the like at line-space intervals, for engagement by said adjustable member.

as. in a type-writing machine, the combination with a revoluhle platen and line-spacing devices therefor, oi a clutch capable of rotating the platen in'either direction through nearly an entire revolution, and stops for limiting the movement of said clutch in each rotative direction; said. clutch comprising a member lixcd to the platen and a member normally stationary during the revolution of the platen by means of said line-spacingdevices, and said members being normally disengaged, and a linger-piece beingprovided.

for eil'ecting their engagement at w l.

47. in a typo-writing machine, the combination with a platen and a line-space wheel, of a crank normally disconnected from the platen and locked against accidental rotation, means for releasing the crank so that it may rotate, and tor connecting the crank to being provided for mechanically lim-' l l i the laten, and stops for limiting the forwar and backward rotation of the crank.

48. In a type-writing machine, the combination with a platen and a line-space wheel, of a crank normally disconnected from the platen and locked against accidental rotation, mean for releasing the crank so that it may rotate, and for connecting the crank to the platen, and temporarily maintaining such connection, a stop for limiting the movement ofthe crank and means dependent upon the turning of the crank, for mechanically releasing the platen from the control of said crank.

49. In a type-writing machine, the combination with a platen,' of a manually-operable device normally disconnected from the platen, means for connecting said device to the platen, sto )S for limiting the forward and backward strokes of said manually-operable device, a rack along which one of said stops adjustable, and a scale'and index for said adjustable stop. i

50. In a type-writing machine, the combination with a platen, of a menually-operable device normally disconnected from the platen, means for connecting said device to the laten, stops for limiting the forward and bac (ward strokes of said manually-operable device,a rack along which one of said stops is adiustable, a scale and index for said adjustab e stop, and an arm whcreon said adjustable stop is mounted; said arm being pivoted concentrically with said manually0perable device, and said stop having a tooth to engage said rack and a spring for maintaining engagement of said tooth with said rack.

51. In a type-writing machine, the combination with a late-n, of a normally disconnected manuall -operable device for rotating -the platen, means for connecting said manually-operable device to the platen at will, stops for limiting the forward and backward movements of said nianually-operable device, a rack fixed u on the framework of the carriage upon whic 1 said stops are mounted, and means for enabling circular adjustment of said rack and stops.

HARRY S. MCCORMAOK.

Witnesses:

THOMAS Wnsr, J. EARLE BROWN. 

